There is no direct relationship between the ruins library and the dungeons and dragons. Are two different game works. Although they all belong to the category of role-playing games, the Ruins Library is Nintendo Switch's exclusive game, while Dungeons and Dragons is a desktop game. Ruins Library is a role-playing game with rich plots and high degree of freedom, while Dungeons and Dragons is a desktop game that requires players to cooperate or compete. Although they are all games, their world outlook, gameplay and rules are very different.